Improvement in bolt-heading machines



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y Bolt-Heading Machines. No. 141,;,059- Patenredjuly 22,1873.

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AM, mom-mammie cam/.(ossume Macaw)y UNITED STATES PATENT OFFICE.

JAMES o. JONES, OE BROOKLYN, AssIeNOE To HIMsELE AND ADOLPH sTARKE, OFNEw YORK, N. Y.

IMPROVEMENT IN BOLT-HEADING MACHINES.

Specification forming part of Letters Patent No. l4l,059, dated July 22,1873; application filed March 27, 1873.

To all whom it may concern:

Be' it known that I, JAMES O. JONES, ofv

Brooklyn, in the county of Kings and State of New York, have inventedanlmprovment in Machinery for Heading Bolts, Spikes, 8vo.,- of which thefollowing is a specification:

This invention relates to the die in which the head is formed. The saiddie is made in two parts, hinged together and opened at the backmovement, and closed and held at the forward movement. In consequence ofmaking this die in two parts, thehead of the bolt is delivered veryeasily when the die opens, and any scalev or other material that mightremain and injure the parts or interfere with their perfect operationfalls out; and this may be facilitated and the dies cooled by jets ofwater easily directed into the dies when open. The means for closing thedies and holding them in position are adjustable to compensate wear.

In the drawing, Figure 1 is a section plan of the dies, punch, andholding mechanism closed. Fig. 2 is a similar view of the same as open,and Fig. 3 is an end view of the punch and die as open.

The dies a a are of ordinary character, and clamp the rod b while thehead is being formed thereon. The mechanism for opening and closingthese, being well known, is not adapted to the bolt-head. They arechangeable, and are secured by bolts 2 2. The jaw 7c is hinged at 3 tothe stock c, and carries one of the dies i, the separation between thejaw k and diestock c being longitudinal and in line with the center ofthe bolt. The lever l at the back end of the jaw k is employed to openthe jaw as the stock e is drawn back,

-the opening at p. Any scale or foreign substance is also free to drop,and water can be ejected upon the faces ofthe dies t'.

As the stock e is moved forward, the end of the jaw k comes into contactwith the stationary incline o, so that the jaw 7c and dies lare closedto place, and firmly held together and against the sides of theclamping-dies a a, while the heading-punch t is moved forward to upsetthe heated bolt and form the head.

The incline o is made adjustable to compensate wear. It is preferable toemploy thin plates at r, the same being introduced behind the incline ofrom time to time, as required. A screw, s, may be used to hold theincline. o in place.

I claim as my invention- The jaw A, hinged to the sliding stock e, l

and carrying one of the diesl' for the bolthead, in combination with theheading-punch sliding in the stock e and the mechanism for opening andclosing the jaw k, substantially as set forth.

Signed by me this 22d day of March, A. D. il

